diff --git a/paddle/pybind/protobuf.cc b/paddle/pybind/protobuf.cc
index 673e0ab80b75e7584aa72beeafee32089415655b..5d5782a6f8abb100b6f37b5187be8af8c15ce6d5 100644
--- a/paddle/pybind/protobuf.cc
+++ b/paddle/pybind/protobuf.cc
@@ -99,7 +99,7 @@ template <typename T, typename RepeatedField>
 inline void VectorToRepeated(const std::vector<T> &vec,
                              RepeatedField *repeated_field) {
   repeated_field->Reserve(vec.size());
-  for (auto &elem : vec) {
+  for (const auto &elem : vec) {
     *repeated_field->Add() = elem;
   }
 }
@@ -124,18 +124,23 @@ public:
 
   VarDesc *Proto() { return &desc_; }
 
+  py::bytes Name() { return desc_.name(); }
+
   void SetShape(const std::vector<int64_t> &dims) {
     VectorToRepeated(dims, desc_.mutable_lod_tensor()->mutable_dims());
   }
 
   void SetDataType(int type_id) {
-    desc_.mutable_lod_tensor()->set_data_type(static_cast<DataType>(type_id));
+    desc_.mutable_lod_tensor()->set_data_type(
+        static_cast<enum DataType>(type_id));
   }
 
   std::vector<int64_t> Shape() {
     return RepeatedToVector(desc_.lod_tensor().dims());
   }
 
+  int DataType() { return desc_.lod_tensor().data_type(); }
+
 private:
   VarDesc desc_;
 };
@@ -322,6 +327,22 @@ public:
     return var;
   }
 
+  VarDescBind *Var(py::bytes name_bytes) const {
+    std::string name = name_bytes;
+    auto it = vars_.find(name);
+    PADDLE_ENFORCE(
+        it != vars_.end(), "Can not find variable %s in current block.", name);
+    return it->second.get();
+  }
+
+  std::vector<VarDescBind *> AllVars() const {
+    std::vector<VarDescBind *> res;
+    for (const auto &p : vars_) {
+      res.push_back(p.second.get());
+    }
+    return res;
+  }
+
   BlockDescBind *ParentBlock() const;
 
   OpDescBind *AppendOp() {
@@ -336,6 +357,14 @@ public:
     return ops_.front().get();
   }
 
+  std::vector<OpDescBind *> AllOps() const {
+    std::vector<OpDescBind *> res;
+    for (const auto &op : ops_) {
+      res.push_back(op.get());
+    }
+    return res;
+  }
+
   void Sync() {
     if (need_update_) {
       auto &op_field = *this->desc_->mutable_ops();
@@ -461,16 +490,26 @@ void BindBlockDesc(py::module &m) {
       .def("prepend_op",
            &BlockDescBind::PrependOp,
            py::return_value_policy::reference)
-      .def("new_var",
-           &BlockDescBind::NewVar,
+      .def(
+          "new_var", &BlockDescBind::NewVar, py::return_value_policy::reference)
+      .def("var", &BlockDescBind::Var, py::return_value_policy::reference)
+      .def("all_vars",
+           &BlockDescBind::AllVars,
+           py::return_value_policy::reference)
+      .def("all_ops",
+           &BlockDescBind::AllOps,
            py::return_value_policy::reference);
 }
 
 void BindVarDsec(py::module &m) {
   py::class_<VarDescBind>(m, "VarDesc", "")
+      .def("name", &VarDescBind::Name, py::return_value_policy::reference)
       .def("set_shape", &VarDescBind::SetShape)
       .def("set_data_type", &VarDescBind::SetDataType)
-      .def("shape", &VarDescBind::Shape);
+      .def("shape", &VarDescBind::Shape, py::return_value_policy::reference)
+      .def("data_type",
+           &VarDescBind::DataType,
+           py::return_value_policy::reference);
 }
 
 void BindOpDesc(py::module &m) {
diff --git a/python/paddle/v2/framework/tests/test_protobuf_descs.py b/python/paddle/v2/framework/tests/test_protobuf_descs.py
index aa9a0b33ac6ad7e37202a79fb45baddf3d889338..0dde9729a9b94fea0a27375a6bd7ce82c63a9190 100644
--- a/python/paddle/v2/framework/tests/test_protobuf_descs.py
+++ b/python/paddle/v2/framework/tests/test_protobuf_descs.py
@@ -57,7 +57,7 @@ class TestOpDesc(unittest.TestCase):
 
 class TestProgramDesc(unittest.TestCase):
     def test_instance(self):
-        program_desc = core.ProgramDesc.instance()
+        program_desc = core.ProgramDesc.__create_program_desc__()
         self.assertIsNotNone(program_desc)
         del program_desc
         program_desc = core.ProgramDesc.instance()
@@ -84,7 +84,7 @@ class TestProgramDesc(unittest.TestCase):
 
 class TestVarDesc(unittest.TestCase):
     def test_shape(self):
-        program_desc = core.ProgramDesc.instance()
+        program_desc = core.ProgramDesc.__create_program_desc__()
         block = program_desc.block(0)
         var = block.new_var('my_var')
         src_shape = [3, 2, 10, 8]
@@ -92,6 +92,39 @@ class TestVarDesc(unittest.TestCase):
         res_shape = var.shape()
         self.assertEqual(src_shape, res_shape)
 
+    def test_data_type(self):
+        program_desc = core.ProgramDesc.__create_program_desc__()
+        block = program_desc.block(0)
+        var = block.new_var('my_var')
+        var.set_data_type(2)
+        self.assertEqual(2, var.data_type)
+
+
+class TestBlockDesc(unittest.TestCase):
+    def test_add_var(self):
+        prog = core.ProgramDesc.__create_program_desc__()
+        self.assertIsNotNone(prog)
+        block = prog.block(0)
+        self.assertIsNotNone(block)
+        var1 = block.new_var("var1")
+        var2 = block.new_var("var2")
+        var3 = block.new_var("var3")
+        all_vars = block.all_vars()
+        self.assertEqual(set(all_vars), set([var1, var2, var3]))
+        var2_re = block.var("var2")
+        self.assertEqual(var2_re, var2)
+
+    def test_add_op(self):
+        prog = core.ProgramDesc.__create_program_desc__()
+        self.assertIsNotNone(prog)
+        block = prog.block(0)
+        self.assertIsNotNone(block)
+        op1 = block.append_op()
+        op2 = block.append_op()
+        op0 = block.prepend_op()
+        all_ops = block.all_ops()
+        self.assertEqual(all_ops, [op0, op1, op2])
+
 
 if __name__ == '__main__':
     unittest.main()